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Activity of modified SnO 2 catalysts for acid‐catalysed reactions
Author(s) -
Jogalekar A. Y.,
Jaiswal R. G.,
Jayaram R. V.
Publication year - 1998
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/(sici)1097-4660(199803)71:3<234::aid-jctb804>3.0.co;2-5
Subject(s) - catalysis , acylation , alkylation , friedel–crafts reaction , chemistry , lewis acids and bases , organic chemistry , acid strength , brønsted–lowry acid–base theory , condensation , zeolite , physics , thermodynamics
The effect of Lewis and Brønsted acid modification on the catalytic behaviour of SnO 2 was studied. Modified AlCl 3 , FeCl 3 , ZnCl 2 and H 2 SO 4 were used for this purpose. Catalytic activity was tested for Friedel–Crafts alkylation, acylation and Pechmann condensation. It was observed that the alkylation activity of SnO 2 was improved upon treatment with Lewis acids and Brønsted acids. However the acylation activity was observed only when SnO 2 was treated with H 2 SO 4 . Moderate improvement in the activity for Pechmann condensation reaction was observed in the case of all the modified catalysts. It was inferred that this method of modification resulted in an increase in acid strength as well as acidity of the parent oxide catalyst. © 1998 SCI